-51
It is: 87-36 = 51
87
29 is prime. 36 and 87 are composite.
The GCF is 3.
87=3x29, 35= 2x2x3x3
23 and 31 are prime. 36, 62 and 87 are composite.
3471
The GCF is: 3
The GCF is 3.
The GCF is 1.
04 25 36 85 87
I've stumbled across it somewhere online to be about 32 to 36 mpg.